Actually, Leonardo wasn't trying to make a penis in this painting which is called the Virgin of the Rocks. His focus in this painting was of the human figures which he loved to recreate and the use of Chiaroscuro to bring the figures out by sort of spotlighting them against the background. There isn't always some form of genitalia in every piece of work and making one on paint is quite a stretch.

ok...........this is the hundrenth penis i have seen the whole time i have been here! If you look hard enough everything is a penis!Also if you look hard enough to find the penis in everythin ur odviously gay!........in conclusion FUCK YOU